381090506 has 16 divisors (see below), whose sum is σ = 582318816. Its totient is φ = 187005456.

The previous prime is 381090503. The next prime is 381090509. The reversal of 381090506 is 605090183.

It is an interprime number because it is at equal distance from previous prime (381090503) and next prime (381090509).

It is not an unprimeable number, because it can be changed into a prime (381090503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31985 + ... + 42251.

It is an arithmetic number, because the mean of its divisors is an integer number (36394926).

Almost surely, 2^381090506 is an apocalyptic number.

381090506 is a deficient number, since it is larger than the sum of its proper divisors (201228310).

381090506 is a wasteful number, since it uses less digits than its factorization.

381090506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 381090506 is about 19521.5395396982. The cubic root of 381090506 is about 725.0078515202.

The spelling of 381090506 in words is "three hundred eighty-one million, ninety thousand, five hundred six".